The Rosco 20 inches 6mm ARC Barrel is designed to maximize the performance of the 6mm ARC cartridge, delivering precision and reliability for long-range shooting. Its SPR contour is engineered for exceptional cold bore accuracy while maintaining a well-balanced weight. Gas ports are optimized for the most popular precision bullet weights and suppressor applications, ensuring consistent performance. This barrel features a Rifle +1 gas system for smooth cycling and enhanced reliability. As part of Rosco Manufacturing's "Purebred" series, it embodies the highest standards of precision craftsmanship. After years of producing barrels for leading OEMs, Rosco refined its process to create a barrel line that pushes the boundaries of performance. Each Purebred barrel is meticulously crafted in Rosco's Rhode Island facility, beginning as a raw 416R stainless steel blank and undergoing rigorous quality control to ensure durability and accuracy. With in-house production of both barrel blanks and extensions, Rosco maintains complete control over quality at every stage. Built to perform under the most demanding conditions, the Purebred series sets a new standard, delivering a barrel that speaks for itself through unmatched performance.

The 416R stainless steel construction ensures long lasting durability and excellent performance under high stress
The corrosion-resistant 80 grit bead-blasted finish enhances the durability and performance of components, minimizing wear and corrosion
The barrel features a 1:7.5 twist rate, offering versatility with different projectile weights
The gas block journal measures 3/4 inches for compatibility with standard gas systems
The 5/8-24 thread pitch ensures compatibility with a wide range of muzzle devices
Step crown barrel design enhances accuracy and barrel longevity
The barrel extension is nickel boron-coated for enhanced durability and corrosion-resistance
SPR profile barrel for enhanced performance and accuracy

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